H.248.26
defines several packages that provide support for extended line supervision
and metering analog lines capabilities for H.248. Changes incorporated by
Corrigendum 1 correct the improper override of the base protocol
function. Amendment 1 adds a phased metering signal suitable for use with
complex metering scenarios that are beyond the capability of the metering
signals already present in the package. It also introduces a new
package to perform metering pulse detection by Media Gateways, and updates
all the packages in the document to conform to the new Packages Template.